Construction and installation of composite manhole

　　According to the bearing capacity, the composite manhole covers are divided into 6 categories: A15, B125, C250, D400, E600, F900, each of which is applied to the corresponding environment. According to my standard GB/T23858-2009 "Inspection of Composite Manhole Covers", A15 type inspection composite manhole covers with bearing capacity are mainly used in areas where motor vehicles are prohibited from entering such areas as green belts and sidewalks to check the embedded depth of composite manhole covers (ie composite manhole covers). The thickness of the manhole cover) should not be less than 20mm. The inspection composite manhole cover used in other places has higher requirements for bearing capacity, and its embedded depth should not be less than 30mm.

　　According to the domestic standard GB26537-2011 "Steel Fiber Concrete Inspection Composite Manhole Cover", the laying height of the composite manhole cover (ie the thickness of the composite manhole cover) should not be less than 30mm. According to the requirements of urban construction industry standards.

      For the recycled resin composite material inspection composite manhole cover, the light composite manhole cover with low load capacity should not be less than 20mm; for the polymer matrix composite material inspection composite manhole cover, the light composite manhole cover should not be less than 50mm; for the cast iron inspection composite manhole cover, the light composite manhole cover should not be Less than 30mm; For composite manhole cover inspection of ductile iron composite resin, the embedded depth of the composite manhole cover should not be less than 30mm. The steel fiber concrete inspection composite manhole cover is also suitable for the green belt and other non-motor vehicles driving or parking passages, and the steel fiber concrete inspection composite manhole cover for the site inspection well. The requirements for the anti-skid patterns or patterns on the surface of composite manhole covers, the compressive strength and bearing capacity of steel fiber concrete are mandatory in this standard.